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20,000 lbs capacity

Product Description

Rotor Mass and Unbalance Limitation 
Maximum Weight20,000 lbs (9071 Kg)
Minimum Weight 100 lb.(45.4Kg)
Maximum Weight per Support
10,000 lbs. (4545 Kg)
Maximum Overload per support 
12,500 lbs. (5682 Kg)
Maximum indicated sensitivity per plane
(Instrument readout capability)
.005 ounce-inch
.014 gram-inch
Maximum Achievable.01 ounce-inch total
Residual Unbalance
under ideal rotor conditions
.005 ounce-inch/plane
but not to exceed .000005 inches
mass center displacement
Maximum Unbalance reduction per run95%
Shipping Weight  
4000 lbs. (1818 Kg) dom.
4400 lbs. (2000 Kg) exp.
Rotor Dimensions                                          
Maximum diameter over bed100 inches (2540 mm)
Rotor belt drive diameter range1-90 inches (25.4 to 2300 mm)   2 belts incl.
Maximum distance between
support bearings centerlines

80  inches (2032 mm) using main base only
No length limitations using  provided extra 10 ft.
(3047 mm) bed

Minimum Distance between
support bearing centerlines
With belt drive:
Outboard: 6.5 inches (165 mm)
Inboard: 12.5 inches (318 mm)
1” (25.4 mm) with optional fixture
Journal diameters on standard
bearing set
½ to 17 in. (12.7 to 431 mm)
Motor & Control 
Variable FrequencyAC Drive with programmable
acceleration/deceleration patterns
DC Injection breaking 0.1 to 240 Hz. Output
Rated horsepower
20hp. at 1800 RPM (15 Kw)
Speed Range10 to 4000 RPM
Power Required200 to 230 Volt, 3 phase 60 Hz
or 380 to 460 Volt, 3 phase 50/60 Hz. Option

Recommended Balancing Speed

150-4000 RPM

Machine Base

120 inch (3048 mm) long x 49.5 inch (1257 mm) wide.  Total width of machine with drive is 105 inches (2667 mm).

Base Installation

No special foundation required.  Bolt to any concrete floor with the capacity to safely support a maximum loaded machine with the motion during operation.

Upright Work Supports  

Each Support supplied with 021-DP Direct Prod High Output Electrodynamic Transducer.
Calibration  traceable  to N.I.S.T.
High capacity anti-friction roller carriages with self aligning, gimble action feature to provide precise line contact between flat rollers and rotor journals.  
Optional offset carriers with babbit lined “V” block bearings are available for short shafts and light loads
Each upright support moves on roller carriers.  Pedestals are locked to the base using  lever assemblies that are hand operated. 


An advanced performance computer system preinstalled with Windows XP Pro, and including a 17" monitor, keyboard, mouse and printer.  Also including, our latest  Windows based balancing program featuring user-friendly report ,menu driven operations and a full page printout, driven by our new 24 bit digital signal processor using  USB technology.

Setup and Calibration

The use of trial weights establish the true effect of a known unbalance at a specific correction plane on the work piece.  Thus the machine is calibrated each time you use it.  This operation requires two runs  but the influence coefficients derived from this procedure aid in minimizing cross-effect and can be saved so that future rotors with the same geometry and mass can be balanced in just one run.

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